Quantum Computing Steps Forward

first_imgWith the University of Michigan’s latest production of a quantum chip, it’s another step forward for quantum computers that will someday dwarf the abilities of today’s machines. Explore further This compact storage leads to another advantage: speed. Without the need to access many memory locations to read data, retrieval is almost instantaneous.Quantum computers will represent a huge leap in processing power as well – they could execute instructions exponentially faster because there would be almost no limit to the size of the instruction. Currently, most computers use 32 or 64 bit instructions.There is another exciting benefit to working with quantum reactions: Entanglement. It describes the ability of quantum matter to “link” two particles. Change one particle and the other changes – instantaneously, even though there is no physical connection! And distance may be irrelevant! This property – not fully understood – would enable computers to talk to each other with no time lag over long distances.Anton Zeilinger at the Institute of Experimental Physics in Vienna, Austria, preformed an experiment to demonstrate entanglement: their group strung an optical-fiber cable in a sewer tunnel under the Danube River with an “entangled” photon at each end. They measured of the state of polarization in one photon (horizontal, vertical, etc…) establishing that the other proton immediately had an identical polarization.What will be the difference to normal computer users? Try instant access to any type of data – whether it is in your computer or on the other side of the planet. As for processing power, few users rarely exceed the abilities of today’s computers. Much computer hardware is used to generate the fancy graphical interface we call Windows – with plenty left over in reserve.Those not familiar with computer science are often surprised to learn there are still a few applications that cannot run easily on today’s computers. They lack of sufficient processing power to do climate modeling, artificial intelligence or break strong encryption.The NSA (National Security Agency) would love to be able to break many a foreign power’s encrypted communications, but has been stymied by the lack of a sufficiently fast computer for the job. Experts estimate it would take more than the lifetime of the Universe using all the computers in the world to break a 1024 bit encryption key – the current standard for serious encryption applications. It’s worth noting that most commercial encryption only uses a 40 bit key. A quantum computer has the potential to break any encryption in a few days.Scientists who study global warming and climate would like to have finer-grained models to be able to predict the weather more effectively and determine the real impact man’s activities have over the planet. Current computers, although fast, still take hours or days to produce weather simulations that lack detail.Artificial intelligence is another field that could use the extra processing power. Current algorithms simply can’t be processed fast enough and, admittedly, may need more refining. However, a quantum computer could theoretically contain more processing power than the human brain in a smaller space – making true AI possible. In fact, more powerful computers often come along well before a use is found for them. In the future, more uses will be found for quantum machines as their tremendous processing power becomes available. But having the machine is not enough. All of today’s software is based on the silicon technology it runs on. New software is already being written to take advantage of quantum computation. One of the most important steps is to write software for error checking. All computers use some type of system to make sure a bit hasn’t accidentally “flopped” from a one to a zero. Quantum computer components, because of their atomic size, will be very susceptible to errors. In fact, one of the biggest problems faced by the scientists working on quantum computing is the problem associated with checking the state of an object so small. How does one check the value of a qubit without changing it? Error checking will be of critical importance and computer scientists have already developed some ideas to insure accuracy in quantum systems. They have also already developed algorithms and equipment for super strong quantum encryption designed to allow hacker-proof security for communications. The National Security Agency and Federal Reserve banks can now buy a quantum cryptographic system from several companies. Anyone who intercepts and tries to read the stream of photons used will disturb the photons in a way that is detectable to both sender and receiver. Quantum encryption represents the first major commercial implementation for what has become known as quantum information science – a blending of quantum mechanics and information theory. As for the software you use in day-to-day computing, no changes will be necessary. Just as software emulators permit Apple users to run Windows and Windows software on the Mac’s Power PC processor – albeit sacrificing some speed – an emulator could quite easily run any programs today at speeds that make the today’s fastest processors look frozen. So you won’t need to run out and buy Microsoft Office 2030 for Quantum Computers – although Bill Gates, if he’s still alive, might like that.It may also change the way we do computing. Like times past when computers were very expensive, we may share a large, centralized quantum computer – one that has the capacity to handle quadrillions of transactions. Connections would be via fiber optic connections and personal data – a whole lifetimes worth – could be stored on a quantum USB-type memory the size of a credit card. This would eliminate the need to have millions of PCs that require upgrading every few years.Don’t expect any of this to happen tomorrow. Scientists are still struggling with some tough problems. Which is the best material from which to make quantum systems? How to check qubit values and not lose the information at the same time? What mechanisms are involved in entanglement? Some experts predict it will be 20 years before we see the first fully functional computers that use quantum materials.No mater how long it takes, money will continue to flow into research efforts. Silicon-based processors are beginning to near the physical limit of smallness and speed. Intel’s best processors currently fabricated using .15 micron process and run 3GHZ.One day we may have more processing power than we know what to do with. It will be up to our imaginations – something no computer may ever accurately match – to think of new problems for these enormously powerful machines to solve. by Philip Dunn, Copyright 2005 PhysOrg.com Scientists unveil the first-ever image of quantum entanglement Working with individual ions or atoms – much smaller than the transistors of even the most advanced microchips – quantum computers may be both more powerful and more compact than existing computers by various orders of magnitude. Common computers today are thousands of times more powerful and more compact than the first 30 ton behemoths, but they use virtually the same logic. The fundamental design has gone unchanged for 50 years.Quantum computing is whole new ball game. The secret lies in the almost magical property of quantum matter to adopt two states simultaneously. Normal integrated circuits store data using transistors which have just two states – on and off. Each quantum circuit, or qubit, can represent at least three states: on, off or both by an effect called quantum superposition. This means much more data can be stored on each individual circuit. Actually, qubits can potentially contain many states. Dr Andrew White, Senior Lecturer in Physics at University of Queensland describes a qubit like this: “A quantum computer takes that on or off state and adds many different possible states. The first thing, if you think of the globe, let the South Pole be on, the North Pole off – that’s not a very good description of the globe. A quantum computer let’s you describe information by saying, look, you can take an arrow from Earth’s center and point it at the North Pole, South Pole or Los Angeles or London, and that’s richer description. You can fit much more information on a single qubit.”Based on Dr. White’s description, a single qubit could replace a whole bank of conventional memory. Normal memory holds a large array of binary numbers expressed as on or off transistors – ones or zeros. Many transistors are needed to express anything more than just a simple number – hence today’s computers need for large memories. For example: you need 8 bits plus one bit for error correction to store the binary number for 256 which is expressed as 11111111. Going back to our globe example, our arrow could point to Amsterdam which could represent 256 – or any other number. A single qubit could store more information than thousands of transistors. Citation: Quantum Computing Steps Forward (2006, January 20) retrieved 18 August 2019 from https://phys.org/news/2006-01-quantum.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more

Simple Method Yields Complex Micro and Nanoparticle Shapes

first_img New imaging method aids in water decontamination “There is a shortage of methods to produce non-spherically shaped polymer particles. We have developed a method that addresses this challenge,” said UCSB engineer Samir Mitragotri, the study’s corresponding scientist, to PhysOrg.com.The method is fairly simple, low cost, and can produce substantial quantities of particles (from billions to trillions) of more than 20 widely varying shapes. These include rods, various disks, bullets, barrels, and lenses.The particles are made of polystyrene, a polymer most commonly used to make foam packaging materials. The pre-shaped particles are spherical and have diameters between 60 nanometers (billionths of a meter) and 10 micrometers (millionths of a meter).The particles are first suspended in a polymer solution, cast into films of varying thicknesses, and mixed with the compound glycerol to plasticize the films. The films were then dried. From there, the researchers used two approaches, dubbed A and B, and then a combination of the two, to engineer the full array of shapes.In approach A, the particles were melted using either a solvent or heat and then the entire film was stretched on an apparatus custom built for the task. By stretching the film in one, two, or both directions, the particles were pulled into various shapes. Different shapes resulted from the use of solvent versus heat, and the thickness of the film also produced new geometries. Among the shapes yielded by approach A were circular disks, rectangular disks, “flying saucers,” rods, and worms.In approach B, the films were stretched before melting, which produced a different set of shapes than A, most more complex, including pulley wheels, barrels, bullets, and capsules.Combining approaches A and B resulted in yet another set of shapes, many rather unusual. These included ribbon-like particles with curled ends, elongated hexagonal disks, and even “ravioli” and “tacos.”Most of the shapes produced were a few micrometers in size, but the scientists were able to produce nanoparticles, which greatly increases the particles’ potential applications. The group says that particles made of polymers other than polystyrene could be produced using their method, and that the method is scalable to produce even greater numbers of them.Added Mitragotri, “There is already evidence supporting the importance of particle shape in various applications, such as the design of new carriers for drug delivery. We believe that the availability of a simple method to make these particles will lead to many new discoveries and technologies.”Citation: Julie A. Champion, Yogesh K. Katare, and Samir Mitragotri (2007) Proc Natl Acad Sci USA 104:11901-11904Copyright 2007 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. In applications from drug delivery to electronics, polymer particles several billionths to millionths of a meter in size could play key roles. But before many of these uses can be realized, scientists must thoroughly understand how these particles behave – behaviors that are strongly linked to the particles’ precise shapes, which so far have been difficult to produce on demand and in variation. Recently, however, scientists from the University of California at Santa Barbara (UCSB) found a way to widen this bottleneck. Citation: Simple Method Yields Complex Micro- and Nanoparticle Shapes (2007, July 26) retrieved 18 August 2019 from https://phys.org/news/2007-07-simple-method-yields-complex-micro-.html A collection of scanning electron microscope images (color added) of the particle shapes, including capsules (C), “tacos” (E), and lenses (R). Photo courtesy of Samir Mitragotri. Explore further This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more

Toshiba bites Apple with 498 ppi display

first_img Toshiba LCD Panel Zooms In-and-Out By Bending It (w/ Video) Citation: Toshiba bites Apple with 498 ppi display (2011, October 24) retrieved 18 August 2019 from https://phys.org/news/2011-10-toshiba-apple-ppi.html “Astounding,” “staggering,” and “Prepare to have your eyes melted,” were some of the reactions. Reports hastened to compare display numbers with those from Apple. Suddenly Apple’s “retina display” iPhone 4/4S smartphones of 326 ppi was a less exciting feat. Adjectives like “razor sharp” were usurped from Apple’s gate and replanted at Toshiba’s.Among other bragging points is the fact that Toshiba’s display can show 16.7 million different colors. Toshiba describes the display technology as based on processing techniques with low-temperature poly-silicon (LTPS) thin-film transistors (TFT) on glass substrates and other fabrication techniques that Toshiba has cultivated over the years.Toshiba credits its LTPS technology as the enabler of advancements like the new LCD display. Low temperature poly silicon makes possible higher pixel density, which in turn makes text and images more readable. That’s especially useful in smaller device screens like handhelds and portable diagnostic equipment, as well as for larger screens, says Toshiba. Explore further More information: Press release © 2011 PhysOrg.com The display is for 2-D images but the LCD panel achieves “high-definition images with photographic quality,” says Toshiba, and those images impart depth and realism.Missing from the announcement were specifics on how the display will translate into product. Many are wondering what type of end product will use the display.One easy assumption is that the display will translate into smaller tablets but a few observers are raising questions about that. The hardware review site AnandTech asks, what is the use for a 6.1-inch display? The report points out that smaller 4.5-inch displays are, with a few exceptions, the maximum for most smartphones. As for tablets, they usually start at 7 inches. Toshiba’s display at 6.1 inches hovers over both categories, too big for smartphones and too small for tablets.Others guess that Toshiba’s targets may be e-reader manufacturers who want to take their displays to a newer level. Those in Yokohama, Japan, this week will be able to see the LCD panel at the FPD International 2011 from October 26 to 28. Enhanced viewing and graphics capabilities are a competitive feature in mobile devices, as manufacturers strive to respond to user wants, needs, and expectations.Toshiba’s new-to-showcase LCD, with its superior resolution, has already attracted much attention. For now, though, in the absence of any product details from Toshiba, Apple can still rest on its laurels. As Apple tells the world, its “retina display” makes viewing “hundreds of pixels better.” (PhysOrg.com) — As soon as Toshiba announced its 6.1-inch Liquid crystal display (LCD) panel last week, bloggers and tech news sites were noting the numbers and poking at mobile display monarchs Apple. Toshiba’s new display packs a 2560×1600 resolution with a 1000:1 contrast ratio. The display works out to 498 pixels per inch (ppi). This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more

Jupiter moon Ganymede found to have a large bulge at equator

first_imgThis natural color view of Ganymede was taken from the Galileo spacecraft during its first encounter with the Jovian moon. North is to the top of the picture and the sun illuminates the surface from the right. The dark areas are the older, more heavily cratered regions and the light areas are younger, tectonically deformed regions. The brownish-gray color is due to mixtures of rocky materials and ice. Bright spots are geologically recent impact craters and their ejecta. The finest details that can be discerned in this picture are about 13.4 km across. The images which combine for this color image were taken 26 June 1996 beginning at Universal Time 8:46:04. Credit: NASA/JPL Explore further Hubble observations suggest underground ocean on Jupiter’s largest moon Ganymede (Phys.org)—A pair of space scientists, one with the Lunar and Planetary Institute in Houston Texas the other with Washington University in St. Lois, has found evidence of a large bulge on Ganymede—the largest satellite in our solar system. In their presentation at this year’s Lunar and Planetary Science Conference, Paul Schenk and William McKinnon outlined what they had observed and offered possible explanations for the existence of the bulge. As noted by National Geographic, the bulge, or protuberance, is approximately the size of Ecuador and about half the height of Mount Kilimanjaro. Ganymede was first observed by Galileo Galilei in 1610—since that time more has been learned about its characteristics—it is bigger than either Pluto or Mercury, for example, and nearly ¾ the size of Mars, which means were it to orbit the sun instead of a planet, it would be categorized as a planet itself. Scientists have also found that it has a metal core, covered by a rock mantle which is itself covered by a very thick sheet of ice. In this new observation, as Schenk was studying data from NASA’s Galileo space probe—he noticed an unusual and previously unknown bulge on the moon’s equator.The researchers proposed at the conference that the bulge came about due to polar wandering—where ice built up at one of the poles and then slid over the top of an ocean below, to the equator, which provides more evidence for the existence of such an ocean (another team announced just two weeks ago that study of the moon’s auroras had provided evidence of an ocean)—polar wandering can only happen if an ice cap sits atop something slippery, like an ocean—if that explanation holds true, than other researchers have pointed out that another similar bulge should exist on the other side of the moon, but we will not know if that is true until another space craft makes its way to the moon.Ganymede was named after the boy (disguised to look like an eagle) carried to Olympus by Zeus, henceforth known as the cupbearer to the Olympian gods. Its discovery was among those that led to the idea that the planets orbit the sun, including ours, rather than the sun orbiting us.center_img © 2015 Phys.org Citation: Jupiter moon Ganymede found to have a large bulge at equator (2015, April 2) retrieved 18 August 2019 from https://phys.org/news/2015-04-jupiter-moon-ganymede-large-bulge.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more

Research pair offer a way to put a living organism into superposition

first_img © 2015 Phys.org (Phys.org)—A pair of physicists, one with Tsinghua University in China, the other with Perdue University in the U.S. has come up with what they believe is a viable way to cause a living organism to be in two places at the same time. In the paper they have posted to the arXiv server, Zhang-Qi Yin and Tongcang Li suggest that an experiment conducted at the University of Colorado recently, could be modified by placing a living organism into a superposition state, rather than using just a piece of metal. Explore further More information: Quantum superposition, entanglement, and state teleportation of a microorganism on an electromechanical oscillator, arXiv:1509.03763 [quant-ph] arxiv.org/abs/1509.03763AbstractSchrodinger’s thought experiment to prepare a cat in a superposition of both alive and dead states reveals profound consequences of quantum mechanics and has attracted enormous interests. Here we propose a straightforward method to create quantum superposition states of a living microorganism by putting a small bacterium on top of an electromechanical oscillator. Our proposal is based on recent developments that the center-of-mass oscillation of a 15-μm-diameter aluminium membrane has been cooled to its quantum ground state [Nature 475, 359 (2011)], and entangled with a microwave field [Science, 342, 710 (2013)]. A microorganism with a mass much smaller than the mass of the electromechanical membrane will not significantly affect the quality factor of the membrane and can be cooled to the quantum ground state together with the membrane. Quantum superposition and teleportation of its center-of-mass motion state can be realized with the help of superconducting microwave circuits. More importantly, the internal states of a microorganism, such as the electron spin of a glycine radical, can be prepared in a quantum superposition state and entangled with its center-of-mass motion. Our proposal can be realized with state-of-art technologies. The proposed setup is also a quantum-limited magnetic resonance force microscope (MRFM) that not only can detect the existence of an electron spin, but also can coherently manipulate and detect the quantum state of the spin. Citation: Research pair offer a way to put a living organism into superposition state (2015, September 24) retrieved 18 August 2019 from https://phys.org/news/2015-09-pair-superposition-state.html Researchers devise a means to ‘gently’ measure qubit without destroying superpositioncenter_img Journal information: arXiv Schrödinger’s cat: a cat, a flask of poison, and a radioactive source are placed in a sealed box. If an internal monitor detects radioactivity (i.e. a single atom decaying), the flask is shattered, releasing the poison that kills the cat. The Copenhagen interpretation of quantum mechanics implies that after a while, the cat is simultaneously alive and dead. Yet, when one looks in the box, one sees the cat either alive or dead, not both alive and dead. This poses the question of when exactly quantum superposition ends and reality collapses into one possibility or the other. Credit: Wikipedia / CC BY-SA 3.0 This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. The research pair liken their experimental idea to bringing to life to the famous Schrödinger thought experiment that involved a cat and other items placed in a closed box—or perhaps more poetically, comparing it to fairy tales where a fairy can exist in more than one place at the same time. Superposition, is of course, a principle of quantum theory that describes a concept where two objects can exist in more than one physical location at the same exact moment.Two years ago, researchers at the University of Colorado put a very small vibrating aluminum membrane into a superposition state—Li and Yin believe that if a microbe were put on the same type of membrane it could be put into a superposition state along with the membrane. They note that to date, no one has put any sort of living organism into a superposition state, despite a lot of interest in doing so by both academics and the public at large.More specifically, the team suggests the way to make it work would involve cooling a common bacterium down to approximately 10mK to prevent chemical activity from taking place and energy from being exchanged with the environment, then causing the microbe to adhere to the membrane using natural forces. That should be enough, they theorize, to allow for the bacterium to be put into a superposition state along with the oscillating membrane.The scheme does raise the question of whether the organism is in fact living (but then so does Schrödinger’s cat) because the microbe would be frozen solid—not dead, necessarily, because once warmed, it would wake and once again act like a living organism. The research pair note that they have no idea at this point how superposition might work with an active organism.They also suggest that if anyone were to actually carry out their ideas via experiment, they might also consider doing another experiment, one that would use the same equipment and microbe, where the position of a microbe would be entangled with the spin of an atom residing inside of it—a way of testing for defective protein DNA inside of a living organism.last_img read more

New extended ionized gas clouds detected in Abell 1367 cluster

first_img Citation: New extended ionized gas clouds detected in Abell 1367 cluster (2017, April 5) retrieved 18 August 2019 from https://phys.org/news/2017-04-ionized-gas-clouds-abell-cluster.html Dozens of new ultra-diffuse galaxies discovered in Abell 2744 Explore further Abell 1367 cluster. The background image is R-band of Palomar Digitized Sky Survey 2 (DSS2). The size of the image is 75 arcmin square. The solid boxes represent the observed regions in this study. Credit: Yagi et al., 2017. More information: Extended ionized gas clouds in the Abell 1367 cluster, arXiv:1703.10301 [astro-ph.GA] arxiv.org/abs/1703.10301AbstractWe surveyed a central 0.6 deg^2 region of Abell 1367 cluster for extended ionized gas clouds (EIGs) using the Subaru prime-focus camera (Suprime-Cam) with a narrow-band filter that covers Halpha. We discovered six new EIGs in addition to five known EIGs. We also found that the Halpha tail from the blue infalling group (BIG) is extended to about 330 kpc in projected distance, which is about twice longer than previously reported. Candidates of star-forming blobs in the tail are detected. The properties of the EIG parent galaxies in Abell 1367 basically resemble those in the Coma cluster. A noticeable difference is that the number of detached EIGs is significantly fewer in Abell 1367, while the fraction of blue member galaxies is higher. The results suggest a difference in the evolutionary stage of the clusters; Abell 1367 is at an earlier stage than the Coma cluster. (Phys.org)—Astronomers have found six new extended ionized gas clouds (EIGs) in the galaxy cluster Abell 1367 (also known as the Leo Cluster). The discovery expands the current list of the cluster’s known EIGs to 11 and provides new clues about the evolution of this group of galaxies. The researchers detailed their findings in a paper published Mar. 30 on arXiv.org. © 2017 Phys.org Located some 330 million light years away in the constellation Leo, Abell 1367 is a young cluster containing at least 70 major galaxies. The cluster is best known for its high fraction of spiral galaxies, low central galaxy density and the irregular shape of hot gas distribution. Moreover, Abell 1367 is one of the best-studied nearby clusters in H-alpha (Hα) spectral line. To date, numerous Hα observations of this cluster have been conducted with the aim of detecting the presence of ionized gas.Such studies are of high importance for astronomers due to the fact that gas around a galaxy in a cluster is an indicator of a recent or ongoing gas-loss event of the parent galaxy. Therefore, finding new EIGs is crucial for detecting gas loss from star-forming galaxies, which could result in better understanding of galaxy evolution processes.The new research paper authored by Masafumi Yagi of the National Astronomical Observatory of Japan (NAOJ) and his team reveals the presence of new EIGs in Abell 1367 and provides more details on the nature of this cluster. In this paper, the researchers described their observations of the central region of Abell 1367 using the Subaru Telescope in Hawaii.”We surveyed a central 0.6 deg2 region of Abell 1367 cluster for extended ionized gas clouds using the Subaru prime-focus camera (Suprime-Cam) with a narrow-band filter that covers Hα,” the paper reads.The observational campaign was carried out in April and May 2014 and resulted in the discovery of six new EIGs in Abell 1367 in addition to five such clouds known before. Furthermore, the data provided by the Subaru Telescope allowed the researchers to find that the Hα tail from the blue infalling group (BIG) is extended to about 1.08 million light years in projected distance, which is about two times longer than previously thought.”The deep Hα image also revealed that the Hα tails are extended in fainter surface brightness much longer than previously known,” the scientists wrote.Given the fact that Abell 1367 together with Abell 1656 (Coma Cluster) make up the SCl 117 supercluster (also known as the Coma Supercluster), the team compared this two clusters taking the new results into account. In general, they found that the properties of the EIG parent galaxies in Abell 1367 basically resemble those in Abell 1656.”The comparison of the parent galaxies of EIGs in Abell 1367 and in the Coma Cluster showed that the properties of the parents are basically similar,” the researchers wrote in the paper.However, one meaningful difference was found by Yagi’s team. They revealed that the length of EIGs is longer and more often connected to star-forming parents in Abell 1367. This indicates that the EIGs and parents in Abell 1367 are, on average, younger than those in Abell 1656. It also means that gas removal from the parent and heating of EIG is slower in Abell 1367. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more

Astronomers detect dozens of new quasars and galaxies

first_img This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Explore further High-redshift quasars and galaxies (at redshift higher than 5.0) are useful probes of the early universe in many respects. They offer essential clues on the evolution of the intergalactic medium, quasar evolution, early supermassive black hole growth, as well as evolution of galaxies through cosmic times. Generally speaking, they enable scientists to study the universe when it looked much different than it does today.Recently, Matsuoka’s team has presented the results from the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) project, which uses multi-band photometry data provided by the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) survey. HSC is a wide-field camera installed on the Subaru 8.2 m telescope located at the summit of Maunakea, Hawaii and operated by NAOJ. The researchers selected nearly 50 photometric candidates from the HSC-SSP source catalog and then observed them with spectrographs on the Subaru Telescope and the Gran Telescopio Canarias (GTC), located on the island on the Canary Island of La Palma, Spain.The observations resulted in the identification of 24 new quasars and eight new luminous galaxies at redshift between 5.7 and 6.8.”We took optical spectra of 48 candidates with GTC/OSIRIS and Subaru/FOCAS, and newly discovered 24 quasars and 8 luminous galaxies at 5.7 < z ≤ 6.8," the paper reads.According to the study, the newly detected quasars have lower luminosity than most of the previously known high-redshift quasi-stellar objects, in contrast to the new galaxies, which have extremely high luminosity when compared to other galaxies found at similar redshift. The quasar with the highest redshift (6.8) described in the paper received designation J1429 − 0104, while the one with the lowest redshift (5.92) was named J0903 + 0211. Among the new galaxies, J1628 + 4312 was found at the highest redshift (6.03) and J2237 − 0006 at the lowest (5.77). J2237 − 0006 is also the most luminous newly found galaxy.Meanwhile, the researchers revealed that the SHELLQs project continues, and more new quasars are being discovered, which will be reported in forthcoming papers. "Further survey observations and follow-up studies of the identified objects, including the construction of the quasar luminosity function at z ∼ 6, are ongoing," they wrote in the paper.The authors also noted that they plan to conduct follow-up observations of the newly discovered quasars and galaxies at various wavelengths from sub-millimeter/radio to X-ray. Several of these objects have already been observed with the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile, near-infrared spectrographs on the Gemini telescope, located in Hawaii and the Very Large Telescope (VLT), also in Chile. © 2017 Phys.org Citation: Astronomers detect dozens of new quasars and galaxies (2017, April 25) retrieved 18 August 2019 from https://phys.org/news/2017-04-astronomers-dozens-quasars-galaxies.html More information: Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). II. Discovery of 32 Quasars and Luminous Galaxies at 5.7 < z < 6.8, arXiv:1704.05854 [astro-ph.GA] arxiv.org/abs/1704.05854AbstractWe present spectroscopic identification of 32 new quasars and luminous galaxies discovered at 5.7 < z < 6.8. This is the second in a series of papers presenting the results of the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) project, which exploits the deep multi-band imaging data produced by the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey. The photometric candidates were selected by a Bayesian probabilistic algorithm, and then observed with spectrographs on the Gran Telescopio Canarias and the Subaru Telescope. Combined with the sample presented in the previous paper, we have now identified 64 HSC sources over about 430 deg2, which include 33 high-z quasars, 14 high-z luminous galaxies, 2 [O III] emitters at z ~ 0.8, and 15 Galactic brown dwarfs. The new quasars have considerably lower luminosity (M1450 ~ -25 to -22 mag) than most of the previously known high-z quasars. Several of these quasars have luminous (> 10^(43) erg/s) and narrow (< 500 km/s) Ly alpha lines, and also a possible mini broad absorption line system of N V 1240 in the composite spectrum, which clearly separate them from typical quasars. On the other hand, the high-z galaxies have extremely high luminosity (M1450 ~ -24 to -22 mag) compared to other galaxies found at similar redshift. With the discovery of these new classes of objects, we are opening up new parameter spaces in the high-z Universe. Further survey observations and follow-up studies of the identified objects, including the construction of the quasar luminosity function at z ~ 6, are ongoing. Reduced spectra of the first set of eight quasars and possible quasars discovered in this work, displayed in decreasing order of redshift. The object name and the estimated redshift are indicated at the top left corner of each panel. The blue dotted lines mark the expected positions of the Lyα and N V λ1240 emission lines, given the redshifts. The spectra were smoothed using inverse-variance weighted means over 3 – 9 pixels (depending on the S/N), for display purposes. The bottom panel displays a sky spectrum, as a guide to the expected noise. Credit: Matsuoka et al., 2017. (Phys.org)—A team of astronomers led by Yoshiki Matsuoka of the National Astronomical Observatory of Japan (NAOJ) has detected a treasure trove of new high-redshift quasars (or quasi-stellar objects) and luminous galaxies. The newly found objects could be very important for our understanding of the early universe. The findings were presented Apr. 19 in a paper published on arXiv.org. High-redshift quasar discovered by Pan-STARRSlast_img read more

Delhi pujas go the theme way

Innovation in times of financial crisis — this is a theme that seems common to the Durga Puja preparations across the Capital.As the puja committees blame the economic constraints, they are also making the most of it with innovative themes such as ecology, rural life, Bengali icons and cuisine.At the Kashmere Gate Durga Puja, one of Delhi’s oldest pujas where the festivities will enter the 103rd year, the colour green and Bengali tradition are touchstones for the rites of invocation. Also Read – ‘Playing Jojo was emotionally exhausting’‘Every year, we allow non-profit groups to collect flowers used in the rituals to extract eco-friendly colours. This year too, many groups are keen to harvest used flowers,’ said Samarendra Bose.Even the idol is eco-friendly, with the ek chala [single frame] idol sculpted in chalk to help it easily dissolve in water during immersion. The idol has been made by Biswajit Pal, an artisan from Calcutta. The pandal or marquee has a rustic flavour reminiscent of the idyllic life of Bengal’s lush countryside. The spotlight, however, is on food. ‘The Also Read – Leslie doing new comedy special with Netflixbhog is important. We feed at least 3,000 people every year,’ he said.Like Kashmere Gate, the emerging theme of this year’s Durga Puja in different parts of the Capital appears to be food.On Sunday, there was a four-hour Delhi Food Walk tour that took food lovers through Chittaranjan Park to taste kathi rolls, phuchka, jhaal-moori, mutton ghugni and fish cutlets and catch a glimpse of the dhunuchi naach, the arti (invocation) dance before the idols to the beat of the dhaks. At the K-Block puja, the scaling down of ostentation will be compensated by nine items on the bhog menu. The theme of the B-Block puja is the 150th birth anniversary of seer-philosopher Swami Vivekananda. The marquee resembles the Vivekananda Rock Memorial in Kanyakumari and the interiors echo the Belur Math. There are also portraits of Vivekananda and extracts from his address at a convention of religions in Chicago in 1897.The Navapalli Puja Samiti in Pocket 40 depicts how the households of landlords in rural Bengal celebrate the festival in thakur dalan — the pillared courtyard outlying private shrines.The Puja committee in Durgotsav, Greater Kailash-II has adopted the girl child as its theme all over the pandal. Maha Kumari — the figure of a schoolgirl standing over on a lion and carrying a trident and a disc — is at the entrance of pandal that has a village mud hut facade and have walls on which children will be allowed to paint. The high point is serving of bhog, served by the women of the puja committee. [IANS] read more

Holy Cow Its art

first_imgLove is not love which alters when it alteration finds. So spake the Bard. And now, centuries later, Singapore-based artist P. Gnana has given artistic touches to his expression of love in his latest exhibition Nothing Else but Love. Gnana dwells on the emotion with the help of humans and an animal — the cow! Using recycled media, oils, fabrics and mixed media — the artist has created paintings, sculptures in bronze and even installations. Shakespeare’s immortal line — Also Read – ‘Playing Jojo was emotionally exhausting’Things base and vile, holding no quantity, love can transpose, to form and dignity — from A Midsummer Night’s Dream, set the tone of the exhibition. ‘The gestures which you can’t do in real life are what I try to portray in my works,’ says Gnana. ‘They express the yearning for an eternal companion,’ he adds. His recent works, though varied, speak the same language — that of love. The Umbilical Bond (oil on canvas), dwells on a mother’s love for her child. The same emotion is portrayed in Also Read – Leslie doing new comedy special with NetflixTimeless Intoxication (oil on canvas) and Reason to live (oil and fabric collage on canvas).     The works are marked by bold strokes and a riot of colours. Androgyny is noticed in some figures but mostly the figures are stark and well shaped. Cows form a major part of his works. Gnana, known widely as a ‘cow-painting artist’ attributes this to his love for the animal. Growing up in Naiveli in Tamil Nadu, the artist grew up seeing cows in the roadside.    ‘My works are part imagination and part memories of the past. Whatever I see, I pepper it with my imagination and use it in my works at some point of time,’ explains the artist.  Incarnation I stands out among his works. It is an installation made out of recycled media that includes parts of two-wheelers and four wheelers which have been added to welded materials. Go take a look and see for yourself the various expressions of love.DETAILAt: Art Spice, The Metropolitan Hotel & Spa, Near Bangla SahibOn till: 30 November Timings:  10 am to 7 pmlast_img read more

4th Annual Indian Comics Convention all set for a Grand show

first_imgMark Waid, an Eisner Award-winning American comic book writer, known for his work on Marvel Comics’ Captain America and David Lloyd, a British comics artist best known as the illustrator of the story V for Vendetta  along with other renowned International personalities are going to be a part of this years gala.Some of the best International comics publishers are coming this year especially for Indian Comic Con. The main participants for the 4th Annual Indian Comic Con are Amar Chitra Katha, Orange Radius, Abhijeet Kini, Pop Culture Publishing, Random House, Campfire Graphic Novel, Holy Cow Entertainment, HarperCollins Publishers,Vimanika Comics, iComics, Manta Ray Comics, DC, Vertigo & Kodansha Comics By Random House India, Viz Media by Simon & Schuster India, Blaft Publications, Chariot Comics, Scholastic India, Meta Desi Comics and more!!  Various workshops will be conducted by creators, artistes and writers of popular comics and graphic novels. Over five new book titles to be launched during the event. The three-day convention will hold sessions With Leading Artists, writers and publishers from India and abroad.  Jatin Varma, founder, Comic Con India, said ‘We are kickstarting our 4th year in a big way by revamping our entire event, adding more exhibitors and content. There will be a lot more for the visitors to do at the event. We aim to take the fan experience up a notch and bring it closer to International standards. With the introduction of nominal ticketing, we hope to provide a lot many more amenities to visitors and our participants.’From this convention onwards, the Comic Con India Awards are going to take place during the main convention itself. CCI aims to recognise the work of all the professionals of India’s Comics Industry.When: 7-9 FebruaryWhere: Thyagraj Stadium (INA)last_img read more